刷洗舌头 口臭不见了

口臭主要是由口腔内产生的硫化物引发的。由于口臭很容易让人联想到口腔卫生不良，所以．许多口臭患者首先足找牙医作洁牙治疗，相当部分的口臭患者通过超声波洁牙机作振荡，彻底消除牙菌斑、软垢、牙结石后，能在一定程度上减轻口臭。但引发口臭的原因还有很多，如食管炎、胃炎、糖尿病、慢性咽炎等。新近的研究表明，舌背舌苔在口臭形成中的作用远远大于牙龈炎和牙周炎。     

口臭“元凶”被锁定

最近，美国医学研究人员证实，一种名为Solobacteriummoorei的细菌是造成口臭的罪魁祸首。口臭一直是一件令人尴尬的事情，有时还会给生活和工作造成伤害。尽管人们想出各种方法缓解或抑制口臭，并怀疑口臭来源于口腔和消化系统以及呼吸系统疾病，但很久以来都不能确定造成口臭的真正原因。     

口臭病因及其预防的研究

所谓口臭即口腔中有异味,口臭如同牙本质过每一样,不是一种独立的疾病,而是许多疾病共有的一种症状。本文重点介绍了口臭的成因.口臭的分类以及口臭的治疗和预防。     

除口臭剂配方

在日常生活中常常会闻到由蒜臭、烟臭、酒臭以及病理性与生理性引起的口臭。口臭是口腔中排出的臭气物质的总称。口腔中的臭气物质主要是胺类、醇类、含硫化合物、脂肪酸等。 口臭可以分为生理性口臭、病理性口臭和饮食(或嗜好物)产生的口臭等三种。生理性口臭是体内代谢物和分泌物异常引起的;病理性口臭是由口腔内牙垢、牙病、牙缝中残留食物分解、消化系统或呼吸系统疾病产生的;饮食引起的口臭包括饮酒、吃生大蒜、洋葱、韭菜等辛辣食物以及吸烟引起的异味。各种异味往往令人生厌,因此,人们希望能用比较方便的方法消除或掩蔽口臭,这样除口臭剂便应运而生。作为一种理想的除口臭剂,应该满足以下条件:(1)使用方便,便于随身携带;(2)消臭效果明显,且消臭持续时间长(不低于2小时);(3)安全无毒,不能含有有害成分;(4)适应性强,最好能消除各类口臭。     

口臭患者的护理体会

目的:探讨口臭患者的特点及其护理要点.方法:对93例口臭患者的护理配合进行分析和总结.结果治疗前后心理分析指导、口腔健康教育是护理配合的重点.结论:细致周到的护理配合既能稳定患者情绪,节省治疗时间,又可建立医护患三者密切的合作关系,提高工作效率.     

水合物氢气分离技术及相关动力学研究

水合物气体分离技术是根据不同气体分子生成水合物的条件不同而提出的，首次提出了利用水合物气体分离技术分离含氢气体的方法，并建立了一套水合物分离装置，对工业生产中的典型含氢气体混合物（CH4－H2混合气，CO2－H2混合气）进行了提纯实验，实验结果表明，水合物气体分离技术对氢气有较好的提纯效果，气流比是影响水合物反应速率的重要因素。利用简化的Englezos-Skovborg水合物生长动力学模型对实验数据进行了计算，结果发现，表征反应的综合影响因子k并非定值，而与进气浓度等因素有关。     

气体炮实用内弹道技术研究

根据气体炮的工作原理和特点，结合实际应用分析了气体炮理论的可行性和实用技术，计算分析了影响气体炮内弹道的因素，给出了实用的气体炮内弹道理论和技术。研究成果可以方便、快捷、准确地用于各种气体炮技术的开发和研制。     

球团竖炉结构参数影响炉内气体流动的数值模拟

运用气固填料床动力学理论建立了球团竖炉料层内气体流动的数学模型，确立了数学模型的边界条件.运用手编程模拟研究炉内气体流动的基本规律，进而探讨竖炉结构参数对炉内气体流动的影响.结果表明:结构参数中，导风墙宽度、焙烧带宽度以及预热焙烧带高度是影响炉内气体流动的主要因素.导风墙宽度和预热焙烧带高度的增加，以及焙烧带宽度的减小会导致冷却风上行趋势减小，焙烧风下行趋势增大.同时，导风墙宽度、预热焙烧带高度以及焙烧带宽度的改变也会导致竖炉内焙烧风与冷却风之比发生改变，即流入风量比发生改变，而流入风量比是决定炉内气体流动的最主要因素.     

底吹中间包气泡形成过程的数模研究

采用两阶段模型，使用MATLAB语言编程，对中间包气幕挡墙砖中气泡的形成过程进行了数学模拟，研究了影响气泡大小的因素。结果表明：中间包内所形成气泡的大小主要受气体流量、钢液流速和气孔直径的影响。气泡直径随气体流量的增大而增大，随钢水流速的增大而减小，随气孔直径的增大而增长。孔径增大对气泡直径的影响较明显，孔径较小且只在较小范围内波动时，钢液流速和气体流量是主要影响因素。     

重庆气矿“三高”气井气体检测仪配置使用现状及对策研究

在天然气生产过程中，天然气泄漏是引发人员中毒、火灾、爆炸事故的主要因素，而对天然气生产场所进行有毒、有害气体检测，是防止因天然气泄漏而导致二次事故或次生事故产生的主要方法。本文针对重庆气矿“三高”气井的特点，通过分析天然气生产场站气体检测仪配置使用现状和故障原因．提出了相应的气体检测仪安全配置对策。     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with     

Journal of Donghua University ( English Edition) Contents of Volume 31

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Brief Introduction to “Journal of Jilin University( Science Edition) ”

<正>"Journal of Jilin University(Science Edition)"is a comprehensive academic journal in the fields of science sponsored by Jilin University and administrated by the Ministry of Education of the Peoples Republic of China.The journal started publication in 1955.The original name at starting publication was"Journal of Natural Science of Northeast People University",which was changed into"Acta Scientiarum Naturalium Universitatis Jilinensis"in 1958 owing to the name change of the university.The present journal name has